Jump to main content
Jump to site search


Effect of the Si/Al ratio in Ga/mesoporous HZSM-5 on the production of benzene, toluene, and xylene via coaromatization of methane and propane

Author affiliations

Abstract

In this work, a series of GaOy supported on mesoporous HZSM-5 (GaOy/meso-XHZSM-5; Si/Al (X), X = 10, 20, 30, and 40) catalysts with different Si/Al molar ratios were prepared for use in the coaromatization of methane and propane. The coaromatization of methane and propane was conducted at 550 °C with a molar ratio of 10 : 1. Gallium oxide (2 wt%) supported on mesoporous HZSM-5 with a Si/Al molar ratio of 20 showed the highest catalytic performance, with an initial BTX yield of 14.2% and a final BTX yield of 13.8% after 6 h of reaction. The catalytic performances of the catalysts showed volcano-shaped trends depending on the Si/Al molar ratio. All of the catalysts showed a slight decrease in activity with time, although the degree of deactivation increased with increasing Si/Al ratio. The poisoning of acid sites by coke deposition is suggested to be the main reason for deactivation. The effects of the Si/Al molar ratio on the physicochemical properties and catalytic performance of the catalysts were investigated. As the molar ratio of Si/Al increased, the BET surface area and pore volume of the catalysts increased, while their total acidity decreased. Hence, it is concluded that both the acid properties and textural properties of the catalysts play a crucial role in determining the catalytic performance in the coaromatization of methane and propane. In summary, GaOy/meso-20HZSM-5 with optimum physicochemical properties demonstrated the best catalytic performance in the coaromatization of methane and propane.

Graphical abstract: Effect of the Si/Al ratio in Ga/mesoporous HZSM-5 on the production of benzene, toluene, and xylene via coaromatization of methane and propane

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Aug 2019, accepted on 03 Oct 2019 and first published on 04 Oct 2019


Article type: Paper
DOI: 10.1039/C9CY01619H
Catal. Sci. Technol., 2019, Advance Article

  •   Request permissions

    Effect of the Si/Al ratio in Ga/mesoporous HZSM-5 on the production of benzene, toluene, and xylene via coaromatization of methane and propane

    M. Y. Gim, C. Song, Y. H. Lim, K. Lee and D. H. Kim, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01619H

Search articles by author

Spotlight

Advertisements